MILLEDGEVILLE, Ga. — Pittsburgh Steeler quarterback Ben Roethlisberger will not be charged with sexually assaulting a college student who claimed he attacked her last month in a nightclub, authorities said yesterday.

Ocmulgee Circuit DA Fred Bright said the 20-year-old’s allegation could not be proved beyond a reasonable doubt, and her lawyer said she did not want to press charges.

“Therefore,” Bright said, “there will be no arrest made nor criminal prosecution against Mr. Roethlisberger.”

The woman initially said Roethlisberger, who had been drinking with friends shortly after his 28th birthday, assaulted her on March 5 at the Milledgeville club Capital City.

But investigators found that she was heavily intoxicated, and a rape kit’s results were inconclusive.

“We are not condoning Mr. Roethlisberger’s actions that night,” Bright said. “But we do not prosecute morals. We prosecute crimes.”

The two-time Super Bowl champ is being sued by a different woman who says he raped her in 2008 at a Lake Tahoe hotel and casino, which he denies.